Cummins 312/315 kVA Diesel Generator Set
Overview
The Cummins 312/315 kVA Diesel Generator Set is a fully integrated power generation system built around Cummins’ proven QSL9 six-cylinder industrial diesel engine platform, delivering a Prime Power rating of 312 kVA and an Emergency Standby Power rating of 315 kVA in the 250 kW power class. This rating pairing places the unit in one of Cummins’ most widely deployed mid-range commercial genset categories, trusted globally for stationary standby and continuous prime power applications across commercial, industrial, and infrastructure projects.
As a supplier of genuine Cummins Inc. power generation equipment, Seven Star LLC offers the 312/315 kVA diesel generator set to commercial developments, industrial facilities, and critical infrastructure projects across the Sultanate of Oman, Muscat, and the wider GCC. Backed by Cummins’ more than a century of engineering heritage, this generator set is engineered to deliver dependable backup and prime power wherever grid reliability cannot be assumed.
Engine and Alternator Design
At the heart of the Cummins 312/315 kVA generator set is a rugged, 4-cycle, 6-cylinder in-line turbocharged diesel engine from the Cummins QSL9 family, engineered for low emissions, fast response to load changes, and reliable performance across demanding duty cycles. The engine pairs with a low-reactance, 2/3-pitch wound brushless alternator, delivering low waveform distortion even under non-linear loads and providing enhanced fault-clearing short-circuit capability for connected electrical systems.
An optional Permanent Magnet Generator (PMG) configuration is available to further enhance motor starting performance and fault-clearing capability in demanding industrial applications. The alternator’s Class H insulation system ensures long-term thermal durability, while the full-authority electronic engine control delivers a superior power-to-weight ratio for a compact overall generator set footprint.
Control System and Monitoring
The Cummins 312/315 kVA generator set is equipped with Cummins’ PowerCommand control system, providing an intuitive digital interface for monitoring engine and alternator parameters, alarm status, and automatic start/stop functionality. This control architecture supports seamless integration with automatic transfer switches (ATS) for standby power applications, allowing the generator set to respond automatically to utility power interruptions without manual intervention.
The set-mounted control panel provides real-time visibility into voltage, current, frequency, and engine operating parameters, while built-in engine protection safeguards against conditions such as low lube oil pressure, high coolant temperature, and overspeed. This level of monitoring and protection is essential for unattended standby installations where early fault detection prevents costly downtime.
Key Features
The Cummins 312/315 kVA Diesel Generator Set combines proven engine technology with flexible configuration options. Core capabilities include:
- Prime Power rating of 312 kVA and Standby Power rating of 315 kVA in the 250 kW power class.
- Cummins QSL9 series 6-cylinder, 4-cycle, turbocharged industrial diesel engine.
- Low-reactance, 2/3-pitch wound alternator with Class H insulation and fault-clearing short-circuit capability.
- Optional Permanent Magnet Generator (PMG) for enhanced motor starting performance.
- PowerCommand digital control system with automatic start/stop and comprehensive engine protection.
- Remote monitoring capability via optional network communication modules for unattended standby sites.
- Available in both 50Hz and 60Hz configurations to match regional grid requirements.
- Sound-attenuated, weather-protective canopy options for outdoor installation.
- Integrated fuel tank options for uninterrupted extended-duration operation.
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Industrial Applications
The Cummins 312/315 kVA generator set is well suited to commercial buildings, light industrial facilities, retail developments, and infrastructure projects across Oman that require dependable backup power in the 250 kW class. Its compact footprint and standard sound-attenuated canopy options make it practical for installation in space-constrained sites while still meeting noise requirements for occupied commercial environments.
Seven Star LLC supplies this Cummins generator set to hospitality developments, healthcare facilities, and industrial plants throughout the Sohar and Salalah economic zones and the broader GCC region, supporting both emergency standby power and continuous prime power operation for sites operating off-grid or in areas with unreliable utility supply.
Technical Specifications
Full technical parameters for the Cummins 312/315 kVA diesel generator set:
| Parameter | Specification |
|---|---|
| Manufacturer | Cummins Inc. |
| Prime Power Rating | 312 kVA (250 kW) |
| Standby Power Rating | 315 kVA (252 kW) |
| Engine Family | Cummins QSL9 Series, 6-Cylinder Turbocharged Diesel |
| Alternator | Brushless, Low-Reactance 2/3 Pitch, Class H Insulation |
| Control System | PowerCommand Digital Control, Auto Start/Stop |
| Frequency Options | 50Hz / 60Hz |
| Enclosure Options | Sound-Attenuated & Weather-Protective Canopy, Open Set |
| Fuel Type | Diesel |
Why Choose Seven Star LLC for Cummins Power Generation
Sizing a 250 kW-class generator set correctly means accounting for real starting loads, not just steady-state demand, and getting this wrong on a commercial or healthcare project in Oman can mean a costly re-order mid-construction. Seven Star LLC’s team works through actual load schedules with consulting engineers and contractors before confirming a Cummins 312/315 kVA order, including guidance on when the optional Permanent Magnet Generator configuration is worth specifying for motor-heavy electrical loads.
We also support customers through the practical logistics of genset delivery in Oman: confirming 50Hz frequency configuration against the site’s utility standard, coordinating canopy and fuel tank options for the installation footprint, and connecting customers with authorized service support for commissioning and ongoing maintenance across Muscat, Sohar, and the wider GCC, including guidance on spare-parts stocking for sites where extended-duration prime power operation is expected.
Request a Quote for Cummins 312/315 kVA Diesel Generator Set
To submit a formal Request for Quote (RFQ), confirm regional stock and configuration availability, or arrange technical consultation for the Cummins 312/315 kVA Diesel Generator Set, please contact the official power generation division at Seven Star LLC today. Our engineers are ready to assist with rapid sourcing, sizing, and installation planning for your standby or prime power project across Oman and the GCC.
Related Products
Cummins Inc., founded in 1919 and headquartered in Columbus, Indiana, is a global leader in power-technology solutions including diesel and natural-gas engines, generators, filtration systems, turbochargers, and electric powertrains deployed across industrial, marine, mining, oil & gas, and power-generation sectors. With operations in over 190 countries and networks of distributors and dealers worldwide, the brand delivers reliable, high-performance equipment designed for demanding applications and evolving energy-transition needs. Seven Star LLC supplies genuine Cummins products for industrial projects across Oman and the Middle East.
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